Adjustable viewing mirror



FIG. 1 is a front perspective view of an adjustable viewing mirror showing my new design;

FIG. 2 is a side elevational view thereof, the side opposite being substantially a mirror image;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front end elevational view thereof; and

FIG. 5 is a rear end elevational view thereof. 

The ornamental design for an adjustable viewing mirror, substantially as shown and described. 